/Engine/Source/Runtime/Engine/Public/SkeletalRenderPublic.h
Given a set of views, update the MinDesiredLODLevel member to indicate the minimum (ie best) LOD we would like to use to render this mesh. This is called from the rendering thread (PreRender) so be very careful what you read/write to.
void UpdateMinDesiredLODLevel ( const [FSceneView](API\Runtime\Engine\FSceneView) * View, const FBoxSphereBounds & Bounds, int32 FrameNumber, uint8 CurFirstLODIdx )